Yes the active ingredient phenylpropanol amine, it has been quite a lot of talk about. They spoke a lot about it some time ago. FDA is recommending to take alternative drugs, it has been proven that in humans it can cause strokes, I heard two different figures, one was that it increses the risk 15 times if you take the drug, another I heard was that it incresed the stroke risk with 50%. So no matter the figure, it sure sounds like a "no do" to me. I cant say if they still have that ingr. or not, but I found out when I read the bottles at home, that certain real common meds at home had it (at least when I checked, may be changed by now) but Alka-Seltzer, Robitussin and Dimetapp all had phenylpropanol amine as one active ingr.
I hadnt heard of Cystolamine so I got curious and did some research and it is apperently still used in vet. med and is used to treat urinary incontinence it is supposed to tighten the bladder sphincter muscle. It also says to watch carefully if your dog shows signs of restlessness, increased heart rate, weakness, pale gums, seizures or difficulty urinating. So I guess the side effects are there even when used in dogs. Mind you I dont think you find many meds without any side effects at all. So probably a matter of making sure the benefits from a meds outweigh the risks. But I think I would think both two and three times and see if there were no alternetives if the vet told me he wanted to treat my dogs with that meds.
Peggy, is your dog still on that meds??
Marit